docs: def readAnnotations(self):
          """
          Annotations from a edf-file
  
          Parameters
          ----------
          None
          """
          annot = self.read_annotation()
          annot = np.array(annot)
          if (annot.shape[0] == 0):
              return np.array([]), np.array([]), np.array([])
          ann_time = self._get_float(annot[:, 0])
          ann_text = annot[:, 2]
          ann_text_out = ["" for x in range(len(annot[:, 1]))]
          for i in np.arange(len(annot[:, 1])):
              ann_text_out[i] = self._convert_string(ann_text[i])
              if annot[i, 1] == '':
                  annot[i, 1] = '-1'
          ann_duration = self._get_float(annot[:, 1])
          return ann_time/10000000, ann_duration, np.array(ann_text_out)